We've all seen art and documents on paper that are discolored and have brown spots, as if someone had held up a cigarette to the paper. The paper is brittle, especially around the edges. All of this damage decreases the value, as well as the beauty, of the item. All this damage is caused by the acids in normal paper products, which literaly burn the paper (acid burn-in)...and all of it could have been prevented!
Here at the MUSEUM SHOP, we would rather prevent damage in the first place than restore a piece already damaged. Art and documents on paper need special handling. 100% acid free matting ("rag" board) must be used under, and on top of, the art or document, so that everything that touches the art is acid-free. The art must not be right against glass; it could become bonded to the glass. (How many of us have tried to take an old family photo out of its frame but find that the photo is bonded to the glass?) The art or document must be separated from the glass by a mat, liner, or second frame. Ultraviolet (UV) glass must be used to filter out the sun's harmful ultraviolet rays. When an item on paper has been properly framed, it should need no more attention...ever!